Mitsubishi Electric FR-E8TR Instruction Manual page 18

 Common terminal
Terminal
Common
symbol
RS-485 communication
SG —
common, analog common
Contact input common (sink
(negative common))
External transistor common
SD —
(source (positive common))
24 VDC power supply common
External transistor common (sink
(negative common))
—
PC
Contact input common (source
(positive common))
SD 24 VDC power supply
SE — Open collector output common
18
PRE-OPERATION INSTRUCTIONS
Terminal name
Common terminal for RS-485 communication and
frequency setting signals (terminal 2 or 4). Do not earth
(ground).
Common terminal for the contact input terminal (sink logic)
and terminal FM.
Connect this terminal to the power supply common
terminal of a transistor output (open collector output)
device, such as a programmable controller, in the source
logic to avoid malfunction by undesirable current.
Common output terminal for 24 VDC 0.1 A power supply
(terminal PC). Isolated from terminals SG and SE.
Connect this terminal to the power supply common
terminal of a transistor output (open collector output)
device, such as a programmable controller, in the sink logic
to avoid malfunction by undesirable current.
Common terminal for contact input terminal (source logic).
This terminal can be used as 24 VDC 0.1 A power supply.
Common terminal for terminals RUN and FU.
Terminal function description
Rated
specification
—
—
Power supply
voltage range:
22 to 26.5 VDC
Permissible load
current: 100 mA
—